Answer:
0
Step-by-step explanation:
cos(68)cos(22)-sin(68)sin(22)
Using the following identity...
"cos(s)cos(t)-sin(s)(sin(22)=cos(s+t)"
We can reduce the problem to...
cos(68+22)
Once we simplify the equation, we get cos(90)
Using the trivial identity, we know that cos(90)=0
Therefore, the answer is 0.
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